125225862561 has 6 divisors (see below), whose sum is σ = 180881801490. Its totient is φ = 83483908368.

The previous prime is 125225862499. The next prime is 125225862617. The reversal of 125225862561 is 165268522521.

125225862561 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 2 + 5 + 86 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 122303378961 + 2922483600 = 349719^2 + 54060^2 .

It is not a de Polignac number, because 125225862561 - 2⁶ = 125225862497 is a prime.

It is a super-2 number, since 2×125225862561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125225862361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6956992356 + ... + 6956992373.

It is an arithmetic number, because the mean of its divisors is an integer number (30146966915).

Almost surely, 2^125225862561 is an apocalyptic number.

It is an amenable number.

125225862561 is a deficient number, since it is larger than the sum of its proper divisors (55655938929).

125225862561 is a wasteful number, since it uses less digits than its factorization.

125225862561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13913984735 (or 13913984732 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 125225862561 in words is "one hundred twenty-five billion, two hundred twenty-five million, eight hundred sixty-two thousand, five hundred sixty-one".